Search: id:A087449
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%I A087449
%S A087449 1,4,19,91,427,1963,8875,39595,174763,764587,3320491,14330539,61516459,
%T A087449 262843051,1118481067,4742359723,20043180715,84467690155,355050629803,
%U A087449 1488921995947,6230565890731,26021775190699,108485147273899
%N A087449 n4^(n-1)+2*4^n/3+1/3.
%C A087449 Binomial transform of A064017.
%F A087449 G.f.: (1-5x+7x^2)/((1-x)(1-4x)^2); a(n)=A002697(n)+A007583(n).
%Y A087449 Sequence in context: A084155 A015530 A010907 this_sequence A004253 A151253 
               A121179
%Y A087449 Adjacent sequences: A087446 A087447 A087448 this_sequence A087450 A087451 
               A087452
%K A087449 easy,nonn
%O A087449 0,2
%A A087449 Paul Barry (pbarry(AT)wit.ie), Sep 05 2003

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